The European Respiratory Monograph 9. Echocardiography: diagnostic and prognostic value in the assessment 144 of pulmonary embolism A. Torbicki 10. Prospects for the prevention and treatment of venous thromboembolism 155 G. Agnelli, C. Becattini 11. Evidence-based diagnostic algorithms for pulmonary embolism: why are they 165 necessary? A. Perrier 12. Pulmonary embolism and pregnancy 177 I.A. Greer 13. Pathophysiology of pulmonary arterial hypertension 191 R. Naeije, P. Dorfmüller 14. World Health Organization classification and risk factors for pulmonary 204 arterial hypertension M. Humbert, O. Sitbon, G. Simonneau 15. Prevention and early diagnosis of pulmonary hypertension 227 A.J. Peacock 16. Chronic thromboembolic pulmonary hypertension: update 2004 243 I.M. Lang, D. Bonderman, J. Jakowitsch, N. Skoro-Sajer, W. Klepetko, M. Kneussl Contents MON 27.qxd 18/11/2003 10:40 Page 2